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Small rectangular circuit board with four Ethernet ports, USB and screw-terminal power inputs, green PCB, compact embedded form factor

Brainboxes

Brainboxes SW-104 4-Port Embedded Ethernet Switch

SKU CH-R9Q5-M6151 MPN SW-104

Industrial 4-port unmanaged Fast Ethernet switch with galvanic isolation, -40 °C to +80 °C range and dual redundant power from USB or 24 V

  • Switch TypeOthers
  • Weight0.35
  • Industrial temperature range from -40°C to +80°C for harsh environments
  • Galvanically isolated ports protect connected devices from electrical interference
  • Dual redundant power inputs accept USB or 24V factory supply
  • Four 10/100 Mbps Fast Ethernet ports for embedded networking
  • Compact plug-in form factor measuring 3.7" × 3.3" × 0.8

Compact Industrial Switch

The Brainboxes SW-104 is an unmanaged four-port Fast Ethernet switch built for embedded industrial use. It operates across a temperature range of -40°C to +80°C and accepts dual redundant power inputs from USB or 24 V supplies. Galvanic isolation on each port protects connected devices from ground loops. No software configuration is required.

Suited For Harsh Embedded Installs

This switch suits engineers integrating networking into machinery, vehicles or outdoor enclosures where wide temperature tolerance and isolated ports are mandatory. The plug-in form factor and removable terminal block simplify wiring in tight cabinets. Buyers who need managed features such as VLANs, SNMP or port mirroring should look elsewhere. It also does not support Gigabit speeds.

Deciding Specification

The critical figure is the 10/100 Mbps port speed combined with per-port galvanic isolation. If the application demands 1 Gbps throughput or managed-layer functions, this model will not meet the requirement. For isolated Fast Ethernet links in extreme environments it is the correct part.

Highlights

  • Industrial temperature range from -40°C to +80°C for harsh environments
  • Galvanically isolated ports protect connected devices from electrical interference
  • Dual redundant power inputs accept USB or 24V factory supply
  • Four 10/100 Mbps Fast Ethernet ports for embedded networking
  • Compact plug-in form factor measuring 3.7" × 3.3" × 0.8

Specifications

BrandBrainboxes
Switch TypeOthers
Weight0.35
Shipping weight0.16 kg
Package size152 × 127 × 51 mm

Questions about this item

Will the removable power terminal need periodic re-termination?

The terminal uses numbered pins for simple wiring and is designed for permanent installation; no scheduled re-termination is specified.

Which limit appears first when all four 10/100 Mbps ports run continuously?

Each port is capped at 100 Mbps, so the per-port Fast Ethernet rate is the first bottleneck under sustained load.

How much heat does the switch produce when powered from 24 V all day?

Power consumption is optimised per link status and the unit operates across a -40 °C to +80 °C industrial temperature range without active cooling.

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